1.6 | Free Fall Motion

A skydiver jumps out of a plane and is falling towards the Earth before she opens her parachute.

• She is in free fall because nothing is holding her up.

• She is in free fall because gravity is pulling her down.

• She is not in free fall because skydiving is an expensive hobby.

• She is not in free fall because gravity is not the only force she is experiencing.

Tags

NGSS.HS-PS2-1

The first space tourist sneaks his pet gerbil up onto the International Space Station and lets the little guy float around.

• The gerbil is in free fall because the only force acting on it is gravity.

• The gerbil is in free fall because it's floating around and not touching anything.

• The gerbil is not in free fall because it's in orbit and not falling towards the Earth.

• The gerbil is not in free fall because even though it's owner didn't pay it's way, space tourism is still an expensive hobby.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Using g = -10 m/s²:

A ball is tossed up from the ground at a speed of 40 m/s. How many seconds does it take to get to the top of its arc?

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS2-1

Using g = -10 m/s²:

A ball is tossed up from the ground at a speed of 40 m/s. How many seconds does it take for it to come back down to the ground?

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Using g = -10 m/s²:

A ball is tossed up from the ground at a speed of 40 m/s. At how many seconds will it be travelling at a speed of 20 m/s?

(Choose all that apply)

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS2-1

Using g = -10 m/s²:

A ball is tossed up from the ground at a speed of 40 m/s. At how many seconds will it be travelling at a velocity of -20 m/s?

(Choose all that apply)

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS2-1

Using g = -10 m/s²:

A ball is tossed up from the ground at a speed of 40 m/s. What will its velocity be after 3 seconds?

• 30 m/s

• 10 m/s

• 0 m/s

• -20 m/s

• -50 m/s

Tags

NGSS.HS-PS2-1

Using g = -10 m/s²:

A ball is tossed up from the ground at a speed of 40 m/s. What will its velocity be after 7 seconds?

• -30 m/s

• The ball will hit the ground before then.

• 0 m/s

• 10 m/s

• 40 m/s

Tags

NGSS.HS-PS2-1

Using g = -10 m/s²:

A ball is tossed up from the ground at a speed of 40 m/s. How many seconds will it take to reach a velocity of -50 m/s?

• 2

• The ball will hit the ground before then.

• 7

• 8

• 9

Tags

NGSS.HS-PS2-1

Using g = -10 m/s²:

A ball is tossed up from the ground at a speed of 40 m/s. What is its velocity at the top of its arc?

• 20 m/s

• 10 m/s

• 0 m/s

• -20 m/s

• -40 m/s

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-2